xref: /openbmc/qemu/util/event_notifier-win32.c (revision 8692aa29)
1 /*
2  * event notifier support
3  *
4  * Copyright Red Hat, Inc. 2010
5  *
6  * Authors:
7  *  Michael S. Tsirkin <mst@redhat.com>
8  *
9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
10  * See the COPYING file in the top-level directory.
11  */
12 
13 #include "qemu/osdep.h"
14 #include "qemu-common.h"
15 #include "qemu/event_notifier.h"
16 #include "qemu/main-loop.h"
17 
18 int event_notifier_init(EventNotifier *e, int active)
19 {
20     e->event = CreateEvent(NULL, TRUE, FALSE, NULL);
21     assert(e->event);
22     return 0;
23 }
24 
25 void event_notifier_cleanup(EventNotifier *e)
26 {
27     CloseHandle(e->event);
28 }
29 
30 HANDLE event_notifier_get_handle(EventNotifier *e)
31 {
32     return e->event;
33 }
34 
35 int event_notifier_set_handler(EventNotifier *e,
36                                bool is_external,
37                                EventNotifierHandler *handler)
38 {
39     if (handler) {
40         return qemu_add_wait_object(e->event, (IOHandler *)handler, e);
41     } else {
42         qemu_del_wait_object(e->event, (IOHandler *)handler, e);
43         return 0;
44     }
45 }
46 
47 int event_notifier_set(EventNotifier *e)
48 {
49     SetEvent(e->event);
50     return 0;
51 }
52 
53 int event_notifier_test_and_clear(EventNotifier *e)
54 {
55     int ret = WaitForSingleObject(e->event, 0);
56     if (ret == WAIT_OBJECT_0) {
57         ResetEvent(e->event);
58         return true;
59     }
60     return false;
61 }
62